Adobe 12040118 - After Effects Standard Tutorial page 505

Original (upper-left), and with effect applied (lower-left and right)
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Card Wipe effect
Note: For information on properties shared by the Card Wipe and Card Dance effects, see Common Lighting controls and Material controls.
This effect simulates a group of cards displaying a picture and then flipping to display another picture. Card Wipe provides control over the number
of rows and columns of cards, the flip direction, and the transition direction (including the ability to use a gradient to determine flip order). You can
also control randomness and jitter to make the effect appear more realistic. By varying the rows and columns, you can also create venetian blind
and Chinese lantern effects.
The Card Wipe effect shares many controls with the Card Dance effect.
This effect works with 8-bpc color.
Original (upper-left), and with effect applied (lower-left and right)
Basic controls
Transition Width The width of the area that actively changes from the original to the new image.
Back Layer The layer that appears in segments on the backs of the cards. You can use any layer in the composition; its Video switch can even
be turned off. If the layer has effects or masks, precompose the layer first.
Rows & Columns Specifies the interaction of the numbers of rows and columns. Independent makes both the Rows and Columns sliders active.
Columns Follows Rows makes only the Rows slider active. If you choose this option, the number of columns is always the same as the number of
rows.
Rows The number of rows, up to 1000.
Columns The number of columns, up to 1000, unless Columns Follows Rows is selected.
Note: Rows and columns are always evenly distributed across a layer, so unusually shaped rectangular tiles don't appear along the edges of a
layer, unless you're using an alpha channel.
Card Scale The size of the cards. A value smaller than 1 scales the cards down, revealing the underlying layer in the gaps. A value greater than 1
scales the cards up, creating a blocky mosaic as they overlap each other.
Flip Axis The axis around which each card flips.
Flip Direction The direction in which the cards flip around their axes.
Flip Order The direction in which the transition occurs. You can also use a gradient to define a custom flip order: Cards flip first where the gradient
is black and last where the gradient is white.